Effect of thermal modulation on the onset of double diffusive convection in a horizontal fluid layer
The effect of time periodic boundary temperatures on the onset of double diffusive convection in a horizontal two component fluid layer is studied using a linear stability analysis. The perturbation method is used to compute the critical thermal Rayleigh number and the corresponding wave number for...
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| Veröffentlicht in: | International journal of thermal sciences 2005-04, Vol.44 (4), p.323-332 |
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| container_title | International journal of thermal sciences |
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| creator | Malashetty, M.S. Basavaraja, D. |
| description | The effect of time periodic boundary temperatures on the onset of double diffusive convection in a horizontal two component fluid layer is studied using a linear stability analysis. The perturbation method is used to compute the critical thermal Rayleigh number and the corresponding wave number for small amplitude temperature modulation. The correction thermal Rayleigh number is calculated as a function of frequency of the modulation, Prandtl number, solute Rayleigh number, and the diffusivity ratio. It is found that the thermal modulation may stabilize an unstable system or destabilize a stable system. In particular it is found that low frequency symmetric modulation is destabilizing whereas the asymmetric modulation and lower wall temperature modulation are stabilizing. The effect of the solute Rayleigh number, ratio of the diffusivities and the Prandtl number are also reported. It is also found that the effect of modulation disappears for large frequency. |
| doi_str_mv | 10.1016/j.ijthermalsci.2004.09.004 |
| format | Article |
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The perturbation method is used to compute the critical thermal Rayleigh number and the corresponding wave number for small amplitude temperature modulation. The correction thermal Rayleigh number is calculated as a function of frequency of the modulation, Prandtl number, solute Rayleigh number, and the diffusivity ratio. It is found that the thermal modulation may stabilize an unstable system or destabilize a stable system. In particular it is found that low frequency symmetric modulation is destabilizing whereas the asymmetric modulation and lower wall temperature modulation are stabilizing. The effect of the solute Rayleigh number, ratio of the diffusivities and the Prandtl number are also reported. 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It is also found that the effect of modulation disappears for large frequency.</description><subject>Buoyancy-driven instability</subject><subject>Convection</subject><subject>Convection and heat transfer</subject><subject>Double diffusion</subject><subject>Exact sciences and technology</subject><subject>Fluid dynamics</subject><subject>Fundamental areas of phenomenology (including applications)</subject><subject>Hydrodynamic stability</subject><subject>Physics</subject><subject>Stability</subject><subject>Thermal modulation</subject><subject>Turbulent flows, convection, and heat transfer</subject><issn>1290-0729</issn><issn>1778-4166</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNqNkN1LwzAUxYsoOKf_QxD0rfWmH2njm8xPEHzR55ClNyyja2bSDuZf750b6KMQOCH87jk3J0kuOWQcuLhZZm45LDCsdBeNy3KAMgOZkRwlE17XTVpyIY7pnktIoc7laXIW4xIAaglykrQP1qIZmLfs4MNWvh07PTjfMzr0ShLxB2n9OO-Qtc7aMboNMuP7DY3vWNczzRY-uC_fD2Rju9G1rNNbDOfJiaUF8eKg0-Tj8eF99py-vj29zO5eU1M01ZA2uZXGNoXUmoOpRWloSVoPRDHPKyhEZSvecMOxMTA3vCoNLwFlSVhZVbqYJtd733XwnyPGQa1cNNh1ukc_RpVLssmLhsDbPWiCjzGgVevgVjpsFQe1K1Yt1d9i1a5YBVKR0PDVIUVHozsbdG9c_HUQgouq3oXc7zmkL28cBkVO2BtsXaDOVOvdf-K-ASmblmk</recordid><startdate>20050401</startdate><enddate>20050401</enddate><creator>Malashetty, M.S.</creator><creator>Basavaraja, D.</creator><general>Elsevier Masson SAS</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20050401</creationdate><title>Effect of thermal modulation on the onset of double diffusive convection in a horizontal fluid layer</title><author>Malashetty, M.S. ; Basavaraja, D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c385t-82f9cf839aa10c764c079ffe063b250365f5181c1e8c0bc154c140e94079455a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Buoyancy-driven instability</topic><topic>Convection</topic><topic>Convection and heat transfer</topic><topic>Double diffusion</topic><topic>Exact sciences and technology</topic><topic>Fluid dynamics</topic><topic>Fundamental areas of phenomenology (including applications)</topic><topic>Hydrodynamic stability</topic><topic>Physics</topic><topic>Stability</topic><topic>Thermal modulation</topic><topic>Turbulent flows, convection, and heat transfer</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Malashetty, M.S.</creatorcontrib><creatorcontrib>Basavaraja, D.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>International journal of thermal sciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Malashetty, M.S.</au><au>Basavaraja, D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of thermal modulation on the onset of double diffusive convection in a horizontal fluid layer</atitle><jtitle>International journal of thermal sciences</jtitle><date>2005-04-01</date><risdate>2005</risdate><volume>44</volume><issue>4</issue><spage>323</spage><epage>332</epage><pages>323-332</pages><issn>1290-0729</issn><eissn>1778-4166</eissn><abstract>The effect of time periodic boundary temperatures on the onset of double diffusive convection in a horizontal two component fluid layer is studied using a linear stability analysis. 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| identifier | ISSN: 1290-0729 |
| ispartof | International journal of thermal sciences, 2005-04, Vol.44 (4), p.323-332 |
| issn | 1290-0729 1778-4166 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Buoyancy-driven instability Convection Convection and heat transfer Double diffusion Exact sciences and technology Fluid dynamics Fundamental areas of phenomenology (including applications) Hydrodynamic stability Physics Stability Thermal modulation Turbulent flows, convection, and heat transfer |
| title | Effect of thermal modulation on the onset of double diffusive convection in a horizontal fluid layer |
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